Recently-discovered 2D van der Waals (vdW) magnets, notably Cr\(_2\) Ge\(_2\) Te\(_6\)  (CGT) [1]} and CrI\(_3\)  [2]}, have easily-manipulated magneto-electric and magneto-optical properties [3]}, [4]}, and therefore are very promising for spintronics. In particular, the layered antiferromagnetic (LAF, i.e. two adjacent FM monolayers coupled antiferromagnetically) order confirmed in bilayer insulating CrI\(_3\)  [2]}, [6]}, [7]}, [8]} adds an intriguing dimension to develop 2D antiferromagnetic spintronics with low power consumption and robustness against perturbations from magnetic fields [9]}, [10]}. A few proposals exploiting LAF have been put forward, including manipulating electron spin by high-intensity electric field [11]} and exotic topological phases by electro-optical effect [12]}. However, the intrinsic LAF systems usually have large band gaps, no or weak spin polarization or low electron mobility [2]}, [3]}, [4]}, [6]}, [7]}, [8]}, [11]}, which strongly limit their applications in design of electronic circuits with low energy consumption.
